These beautiful earrings are composed of 92.5% sterilng silver and rhodium (a precious metal also used over solid white gold jewelry) plated, adhering the same process of sparkly finish, in order to improve its apprearance and resist any tarnishing. CZ accents fulfill its delicateness and further deliver its brilliant look. The Screwback is a safety back that screws on and locks thus preventing for any poking in the back of the earlobe and lessening chances of lost earrings.